00342nam a2200133 a 450000500170000008200160001710000200003324500230005325000120007626000310008830000290011949000430014863000170019120251202164140.0  a338.52bDOR  aDorfman, Robert  aPrices and markets  a3rd ed.  aDelhibPrentice-Hallc1990  aviii, 264 p.b22 cm.cPB  aFoundations of modern economics series  aPrice theory